Yemassee, South Carolina has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.3 °C (low) to 25.2 °C (high). Annual precipitation averages 1332 Millimeters. Yemassee is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.4 °C | 15.8 °C | 97.28 mm |
| February | 4 °C | 17.7 °C | 95.5 mm |
| March | 7.3 °C | 21.4 °C | 90.93 mm |
| April | 11.2 °C | 25.5 °C | 81.28 mm |
| May | 15.9 °C | 29.3 °C | 86.36 mm |
| June | 20 °C | 32.1 °C | 149.35 mm |
| July | 21.8 °C | 33.4 °C | 159.51 mm |
| August | 21.6 °C | 32.6 °C | 156.72 mm |
| September | 19 °C | 30.1 °C | 136.14 mm |
| October | 12.9 °C | 25.9 °C | 103.89 mm |
| November | 7.1 °C | 20.8 °C | 75.18 mm |
| December | 4.2 °C | 17.2 °C | 99.82 mm |
| Annual | 12.3 °C | 25.2 °C | 1331.96 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |